Browse the evidence

Continued global nutrition transition toward high animal-source food and empty calorie consumption will result in 45% of the world population being overweight and 16% obese by 2050, driving a 50% increase in global food demand.

To avoid the projected 45% overweight rate by 2050, individuals and policymakers must prioritize reducing household food waste and shifting dietary composition away from animal-source foods and empty calories. This involves increasing consumption of vegetables, fruits, and nuts, and recognizing that current trends are unsustainable for both health and the environment.

High levels of daily physical activity in hunter-gatherer populations do not result in higher total energy expenditure (TEE) compared to industrialized populations, as the body compensates by reducing non-exercise activity thermogenesis (NEAT) and resting metabolic rate (RMR).

Do not rely on exercise alone to create a massive caloric deficit, as your body may compensate by lowering its resting metabolic rate. Focus on dietary quality and portion control, as high activity levels alone may not increase total energy expenditure significantly enough to drive weight loss if diet is not managed.

GIPR antagonism reduces the Respiratory Exchange Ratio (RER) during rest, indicating increased lipid oxidation as a mechanism for weight loss.

Blocking GIP receptors may help your body burn more fat for fuel while at rest, even without changing your activity level. This metabolic shift contributes to the overall weight loss observed.

Activation of AMPK by dietary restriction or compounds like metformin extends lifespan by inhibiting mTOR and promoting mitochondrial biogenesis.

Dietary restriction activates AMPK, which improves mitochondrial health and extends lifespan. If strict dieting is not feasible, compounds like metformin (which activate AMPK) or time-restricted eating may offer similar metabolic benefits.

Gut microbiota depletion via broad-spectrum antibiotics significantly reduces skeletal muscle endurance and fatigue resistance in healthy mice, an effect mediated by altered glucose homeostasis and muscle glycogen levels rather than changes in muscle mass or mitochondrial function.

Maintaining a healthy gut microbiome is important for muscle endurance. While this study used mice, it suggests that factors disrupting gut bacteria (like broad-spectrum antibiotics) may temporarily reduce your stamina and fatigue resistance. Restoring gut health (natural reseeding) can reverse these effects. Focus on fiber-rich foods and fermented foods to support gut bacteria, which may help optimize glucose availability for your muscles during exercise.

Decreased mitochondrial biogenesis and dysregulated lipid oxidation lead to compromised skeletal muscle bioenergetic status (low ATP) and muscle wasting in early critical illness.

Early muscle loss in the ICU is driven by a failure of the muscle's energy factories (mitochondria) to produce ATP, not just by lack of movement. This metabolic shutdown prevents recovery even if nutrition is provided.

Physical activity level (PAL) in humans is biologically constrained, with a maximum sustainable value of approximately 2.0-2.5, meaning energy intake, not just activity, drives obesity trends.

You cannot simply 'out-exercise' a poor diet because your body has a hard limit on how much energy you can burn through daily activity (max PAL ~2.5). Since energy expenditure doesn't scale infinitely with activity, managing energy intake is the critical lever for body mass regulation.

Cold exposure induces adaptive thermogenesis primarily through non-shivering thermogenesis (NST) mediated by brown adipose tissue (BAT) and UCP1, regulated by the hypothalamus.

Exposure to cold temperatures can activate brown fat, which burns calories to generate heat. This process, called non-shivering thermogenesis, is regulated by your hypothalamus. While not a replacement for diet and exercise, leveraging cold exposure (like cooler room temps) may support metabolic health.

PPARα activation suppresses the liver secretome (including complement and coagulation factors) to conserve energy during fasting, whereas FXR activation induces secretion to support nutrient processing in the fed state.

Your liver actively manages energy by adjusting how much protein it secretes based on whether you are eating or fasting. In the fed state, it produces more proteins (like clotting factors and complement) to support nutrient processing. In the fasted state, it reduces this production to save energy. This suggests that nutritional strategies, particularly for those with metabolic issues or undernutrition, should consider the timing of nutrient intake to align with these natural hormonal switches (PPARα for fasting, FXR for feeding).

Elevated plasma acylcarnitine levels, particularly long-chain species, are biomarkers of insulin resistance and incomplete fatty acid oxidation in Type 2 Diabetes, reflecting mitochondrial stress rather than directly causing insulin resistance.

High levels of acylcarnitines in the blood are a sign of how your body is processing fats and sugars, indicating mitochondrial stress in T2D. This helps doctors understand the severity of metabolic dysfunction.

Obesity is associated with a specific gut microbiota composition characterized by a higher Firmicutes-to-Bacteroidetes ratio, lower bacterial gene richness, and increased gut permeability leading to metabolic endotoxemia.

Obesity is linked to a less diverse gut microbiome with specific bacterial imbalances. While you cannot directly 'buy' a healthy microbiome, eating a diverse, fiber-rich diet supports the bacteria that help regulate energy and inflammation.

Sedentary behavior interventions do not produce significant changes in fat-free mass, diastolic blood pressure, fasting glucose, HbA1c, LDL cholesterol, or triglycerides.

Do not expect sedentary reduction to significantly change your blood sugar levels (HbA1c, fasting glucose), cholesterol (LDL, Triglycerides), or muscle mass. While these metrics may show slight beneficial trends, the changes are not statistically significant. Focus on the proven benefits like improved blood pressure and insulin sensitivity instead.

Caloric restriction (CR) without malnutrition extends healthspan and lifespan across multiple species by modulating nutrient-sensing pathways such as mTORC1, AMPK, and Sirtuins.

To potentially extend healthspan, reduce your caloric intake by 20-30% below your maintenance level without sacrificing essential nutrients. Focus on nutrient-dense foods to avoid malnutrition while triggering metabolic adaptations like autophagy and improved insulin sensitivity.

uPAR-targeting CAR T cells effectively treat metabolic syndrome induced by a high-fat diet in young mice, improving body weight, glucose tolerance, and insulin sensitivity.

In a mouse model of obesity, clearing senescent cells via CAR T therapy improved metabolic health and reduced body weight, even when the mice continued to eat a high-fat diet.

Restoration of mitochondrial ultrastructure via SS-31 peptide treatment rescues the regenerative defects caused by α-Klotho deficiency.

Targeting mitochondrial health with peptides like SS-31 may help overcome regeneration deficits in individuals with low α-Klotho levels.

Shifting global production to match the Harvard Healthy Eating Plate (HHEP) recommendations would save 51 million hectares of arable land compared to current production levels.

Producing food according to nutritional guidelines (more fruits/veg, less grain/sugar) is more land-efficient than current practices. This shift saves 51 million hectares of arable land, preserving habitats and ecosystem services.

Adopting the HHEP diet increases total greenhouse gas (GHG) emissions by 49% compared to the current global diet, primarily due to increased animal-source protein consumption.

A diet that meets nutritional guidelines (HHEP) may increase GHG emissions if it relies on animal protein. To reduce emissions, combine healthy eating with plant-based proteins (legumes, seeds, nuts), which have a much lower GHG footprint.

Reducing global obesity prevalence to 2019 levels could save an estimated US$2.2 trillion annually by 2060 through healthcare and productivity-related cost savings.

Addressing obesity at a population level saves massive amounts of money globally. Public health policies that reduce obesity prevalence have a high economic return on investment.

Bariatric surgery in older adults (≥65 years) is associated with significantly higher rates of in-hospital mortality and complications compared to younger adults, and should be reserved for refractory cases.

Surgery is the most effective weight loss method but carries higher risks for those over 65. It should only be considered if you have severe obesity and have failed all other treatments, after a thorough risk-benefit discussion with specialists.

Cardiovascular disease (CVD) is the leading cause of death in China, accounting for 36% of deaths.

Healthcare strategies in China should prioritize addressing CVD to reduce mortality.

There has been little attention paid to designs, methods, and analytic techniques for early phase trials in behavioral intervention research.

More focus is needed on innovative designs for early phase trials in behavioral interventions.

No significant associations were found between LCD scores and mortality risk in other racial and ethnic groups.

Practitioners should be aware that LCD scores may not be relevant for mortality risk in non-Hispanic populations.

Despite extensive research, many unknowns remain in the field of nutrition due to the difficulty of studying lifestyle factors in isolation.

Practitioners should remain aware of the complexities and uncertainties in nutrition research.

Mitochondrial dysfunction, specifically the loss of mild depolarization in short-lived mice, contributes to aging by increasing ROS-mediated protein damage.

Maintaining mitochondrial health through exercise and healthy metabolism may preserve the 'mild depolarization' state seen in long-lived species, potentially reducing oxidative stress.